Speaker
Vanessa Polito
(University of Cambridge)
Description
The intensity of the OIV and SIV intercombination lines around 1400 Å observed with
the Interface Region Imaging Spectrograph (IRIS) provide a useful tool to diagnose
the electron number density in the solar transition region plasma. We measure the
electron density in a variety of solar features, including a loop and a bright point
in the AR NOAA 12356 and at the ribbons of the 22-June-2015 X-class flare observed by
IRIS. In particular, we obtain high densities (≈1013 cm-3) during the impulsive phase
of the flare. Finally, we investigate the effects of the high density and
non-Maxwellian electron distribution on the atomic data used for the density diagnostics.
Primary author
Vanessa Polito
(University of Cambridge)
